Layer in a 1-quart glass jar or canister the following ingredients: white baking pieces, half the brown sugar, half the biscuit mix, remaining brown sugar, remaining biscuit mix, and almonds. Tap jar gently on the counter to settle each layer before adding the next. Cover jar and store at room temperature up to 1 month, or attach baking directions and give as a gift.
Heat oven to 350 degree F. Grease an 8x8x2-inch baking pan. Empty contents of jar into a large mixing bowl. Melt butter; add to cookie mix along with egg and vanilla. Stir until combined. Spread into prepared pan. Bake about 25 minutes or until golden brown around edges and center is almost set. Cool in pan on a wire rack. Cut into bars.